Mock 2.2

15 Questions | Total Attempts: 11

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Mock Test Quizzes & Trivia

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Questions and Answers
  • 1. 
    In general, the __________ the RF coil, the __________ the SNR.
    • A. 

      Bigger / better

    • B. 

      Smaller / better

    • C. 

      Smaller / lower

    • D. 

      Bigger / lower

  • 2. 
    The contrast parameters that effect SNR includes: __________.
    • A. 

      TR & TE

    • B. 

      TR, TE & flip angle

    • C. 

      TR, TE, TI and flip angle

    • D. 

      These parametes do not affect SNR

  • 3. 
    SNR is __________ proportional to the voxel volume .
    • A. 

      Directly

    • B. 

      Inversely

    • C. 

      Quadratic

    • D. 

      Square root

  • 4. 
    As the voxel volume increases the SNR __________.
    • A. 

      Increases

    • B. 

      Decreases

    • C. 

      Stays the same

    • D. 

      Doubles

  • 5. 
    If the voxel volume doubles, the SNR __________.
    • A. 

      Increases

    • B. 

      Decreases

    • C. 

      Stays the same

    • D. 

      Doubles

  • 6. 
    Voxel volume is determined by __________.
    • A. 

      FOV

    • B. 

      Thickness

    • C. 

      Matrix

    • D. 

      All of the above

  • 7. 
    Increasing the slice thickness will __________ SNR
    • A. 

      Increase

    • B. 

      Decrease

    • C. 

      Not change

    • D. 

      Double

  • 8. 
    If the slice thickness doubles, the SNR __________.
    • A. 

      Increases

    • B. 

      Decreases

    • C. 

      Stays the same

    • D. 

      Doubles

  • 9. 
    Reducing the number of phase and/or frequency encodings increases voxel volume and __________ SNR.
    • A. 

      Increases

    • B. 

      Decreases

    • C. 

      Stays the same

    • D. 

      Doubles

  • 10. 
    If the matrix is reduced by 2 (going from 256 x 256 to 128 x 256) the voxel size is doubled and SNR would increase by a factor of __________.
    • A. 

      2

    • B. 

      4

    • C. 

      6

    • D. 

      8

  • 11. 
    Increasing the FOV increases voxel volume and __________ SNR.
    • A. 

      Increases

    • B. 

      Decreases

    • C. 

      Stays the same

    • D. 

      Doubles

  • 12. 
    If FOV is doubled (going from 12cm to 24cm) the voxel size is increased in two dimensions and therefore the voxel size is increased by __________.
    • A. 

      2

    • B. 

      4

    • C. 

      6

    • D. 

      8

  • 13. 
    The term "sampling parameters" refers to parameters that control the amount of time spent sampling the MR signal including: __________.
    • A. 

      NSA, NEX, Acquisitions, etc.

    • B. 

      Phase encodings or in the 3D acquisition the # slices (partitions)

    • C. 

      Receiver bandwidth

    • D. 

      All of the above

  • 14. 
    With sampling parameters, SNR increases __________ with the change.
    • A. 

      Directly

    • B. 

      Inversely

    • C. 

      As the quadratic

    • D. 

      As the square root

  • 15. 
    If the NSA is increased by 2 the SNR increases by __________.
    • A. 

      2

    • B. 

      Square root of 2

    • C. 

      22

    • D. 

      100%